Job of the muscle: The job of this muscle is to stabilize the shoulder joint and also to provide the movement that is called internal rotation. This is the only muscle of the rotator cuff group that stabilizes the shoulder from the front and it lives in the same place as the armpit.
Activities that you need it for: Reaching, pressing, pushing, pulling and using your shoulder. Essentially any movement of the shoulder this muscle is very active and important.
Injuries associated with it: Adhesion, shoulder impingement, rotator cuff problems (strains and tears, shoulder bursitis, popping and clicking shoulder, nerve entrapments, carpal tunnel and nerve distribution problems.
Our take on the muscle: This is a big and strong muscle of the shoulder and is poorly treated by the majority of practitioners out there. The problem is the muscle is in a very sensitive area with a lot of nerve and blood vessels. Most practitioners think they are treating this muscle when they in fact are actually only treating the lats. A lot of times when someone gets this muscle treated they describe it as “very painful,” but it shouldn't be if done by an expert. Adhesion in this muscle is the most common cause for pain, weakness and decreased flexibility in the shoulder. Any shoulder injury will never fully resolve without a fully functioning subscapularis muscle. We are experts at finding and fixing adhesion. Adhesion is completely reversible with expert treatment and should never be too painful. Shoulder injuries can often be managed with conservative care, but it has to be done very precise and focused.